20557202 has 16 divisors (see below), whose sum is σ = 32638560. Its totient is φ = 9683712.

The previous prime is 20557181. The next prime is 20557211. The reversal of 20557202 is 20275502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5933 + ... + 8735.

It is an arithmetic number, because the mean of its divisors is an integer number (2039910).

Almost surely, 2^20557202 is an apocalyptic number.

20557202 is a deficient number, since it is larger than the sum of its proper divisors (12081358).

20557202 is a wasteful number, since it uses less digits than its factorization.

20557202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20557202 is about 4534.0050727806. The cubic root of 20557202 is about 273.9395057101.

It can be divided in two parts, 20557 and 202, that multiplied together give a palindrome (4152514).

The spelling of 20557202 in words is "twenty million, five hundred fifty-seven thousand, two hundred two".